Pattern for cylinders.



PATENTED JUNE 30, 1908.

G. G. BOURDERBAUX. PATTERN FOR CYLINDERS.

APPLICATION FILED JAN. 21. 1907.

1n: NORRIS PETERS cm. WAsmmrroN. II. c.

UNITED STATES PATENT OFFICE.

GEORGE O. BOURDEREAUX, OF PEORIA, ILLINOIS, ASSIGNOR OF ONE-THIRD TO MELVIN W. SWARTZ AND TWO-THIRDS TO JULIA BOURDEREAUX, BOTH OF PEORIA, ILLINOIS.

PATTERN FOR CYLINDERS.

To all whom it may concern:

Be it known that I, GEORGE C. BoURDE- REAUX, citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Patterns for Cylinders; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention pertains to a pattern from which to cast flanged cylinders.

The object of the invention is to provide a pattern with detachable flanges by means of which the mold for the cylinder-casting may be easily and quickly made without fear of disturbing the sand in which the print is made in withdrawing the pattern.

Another object is to provide a pattern for casting flanged cylinders comprising a body and flanges therefor the former being removable from the latter in making the mold.

In providing cylinders for gas ex losion engines it is often desirable to cast wit 1 them a series of cooling-flanges the latter being sometimes dis osed upon the surface of the cylinder paral el to the cylinder axis and sometimes disposed about the cylinder in rings the planes of which lie at right angles to the axis of the cylinder. In the present instance I am dealing with the former class i. 8., such cylinders as are to have flanges parallel to the axis of the cylinder.

To the end that my ideas may be fully understood I have provided the accompanying drawing in which Figure 1 is a top view of the assembled pattern. Fig. 2 is a sectional elevation of the same on line X X, Fig. 1, showing one of the flanges slightly displaced. Fig. 3 is a top view of the pattern body showing grooves that receive the flanges. Fig. 4 is a top or end view of one of the detached flanges. Fig. 5 is a perspective view of a portion of the top of the pattern body show ing a flange and means by which the latter is held in its groove.

The body of the pattern is designated by the letter A which is in the form of a c linder in the drawing being shown as 1101 ow al though it may be solid and provided with core prints for use in coring out the casting as in common practice. The outer surface of the body is provided at intervals with Specification of Letters Patent.

Application filed January 21, 1907.

Patented June 30, 1908.

Serial No. 353,381.

grooves B which lie parallel to the axis of the cylinder and preferably extend the full len th thereof as indicated by broken lines at in Fig. 2 and said grooves may be disposed about the entire cylinder as shown, or only partially as may be required according to circumstances governing the'use of place of installation of the engine. A series of flanges C are now provided and which are adapted to seat in the grooves B. Some means must be employed for securing the flanges in place and for this purpose I drill a hole D partially in the body A, at the side of each groove, and partially in the flange by starting said hole at the juncture of the flange and the body when the former is properly seated in its place. This, however, can also be accom lished by grooving the body at the side of tie groove B and grooving the flange to correspond so that when the grooves are opposite one another a in E, Fig. 5, may be inserted. It is evident, iowever, that the more accurate way is to drill the hole thereby insuring a better fit for the pin E and also by so doing the flanges will be interchangeable since they must be made so that they will enter and can be held in any of the grooves B in which they may be placed. I desire to state that any other securing means may be employed I having merely shown a way of holding the flanges in place to make the practical working of my invention fully understood. The pins E prevent the flanges from falling away from the body there always being sufficient friction between the flanges and body to prevent the former from slipping out of the grooves B in an endwise direction.

In making the mold for the casting the assembled pattern as shown in Fig. 1 is set on end in the flask and the sand is filled in and thoroughly tamped in place between and around the flanges and around the body A. After the work is complete the body is rapped after which the pins E are all withdrawn leaving the flanges and body easily se arable. The rapping process slightly e arges the mold and permits the parts, of course, to be more easily Withdrawn i'rom the sand. The body A is now lifted from the sand leaving the flanges still in their places. Now the flanges which may be slightly tapered as shown are drawn one at a time inward or toward the center of the space left by the body and when all are thus removed the would be met with disaster since in such at-' tempt the sand would be disturbed by all of the flanges since it would be almost impossible to raise the pattern without such disturbance, and if the sand is broken in the withdrawal the entire mold must be again made resulting in loss of time and making the work expensive. But by having the flanges and body separable as described, the latter is readily lifted out of the sand followed by the flanges in the manner described without likelihood of disturbing the mold in the least.

Those parts of the flange where they seat in the grooves have parallel sides so that they can be easily entered and withdrawn from such grooves. They may be tapered, however, and seat in tapered grooves so that their entrances and withdrawal would be much more easily accomplished, but thisis merelya detail well within the meaning of my invention.

I do not wish to confine myself to placing the flanges radially upon the cylinder since, if

desired, they may be arranged in several groups those of the several groups being parallel to each other. Other ways of their disposial upon the'body could be resorted to as wel Having described my invention, I claim:

A pattern comprising a cylindrical body provided u on its convex surface with grooves para lel to its axis and each undercut upon one side, a series of flanges each adapted to be loosely seated in one of said grooves and provided near its seating edge with a lateral channel in position to register with the undercut portion of its groove, and rods adapted to be removably inserted, respectively, in the passages formed by said channels and undercut walls, substantially as and for the purpose set forth.

In testimony whereof I affix my signature, in presence of two witnesses.

GEORGE C. BOURDEREAUX.

Witnesses:

LUTHER C. HINoKLE, SADIE FRIEDMAN. 

